Updates to make crates publishable (#2472)

## Issue Addressed

Related to: #2259

Made an attempt at all the necessary updates here to publish the crates to crates.io. I incremented the minor versions on all the crates that have been previously published. We still might run into some issues as we try to publish because I'm not able to test this out but I think it's a good starting point.

## Proposed Changes

- Add description and license to `ssz_types` and `serde_util`
- rename `serde_util` to `eth2_serde_util`
- increment minor versions
- remove path dependencies
- remove patch dependencies 

## Additional Info
Crates published: 

- [x] `tree_hash` -- need to publish `tree_hash_derive` and `eth2_hashing` first
- [x] `eth2_ssz_types` -- need to publish `eth2_serde_util` first
- [x] `tree_hash_derive`
- [x] `eth2_ssz`
- [x] `eth2_ssz_derive`
- [x] `eth2_serde_util`
- [x] `eth2_hashing`


Co-authored-by: realbigsean <seananderson33@gmail.com>

common/eth2/src/lighthouse_vc/http_client.rs

@@ -36,7 +36,7 @@ pub fn parse_pubkey(secret: &str) -> Result<PublicKey, Error> {
         &secret[SECRET_PREFIX.len()..]
     };
 
-    serde_utils::hex::decode(secret)
+    eth2_serde_utils::hex::decode(secret)
         .map_err(|e| Error::InvalidSecret(format!("invalid hex: {:?}", e)))
         .and_then(|bytes| {
             if bytes.len() != PK_LEN {
@@ -101,7 +101,7 @@ impl ValidatorClientHttpClient {
         let message =
             Message::parse_slice(digest(&SHA256, &body).as_ref()).expect("sha256 is 32 bytes");
 
-        serde_utils::hex::decode(&sig)
+        eth2_serde_utils::hex::decode(&sig)
             .ok()
             .and_then(|bytes| {
                 let sig = Signature::parse_der(&bytes).ok()?;

common/eth2/src/lighthouse_vc/types.rs

@@ -21,14 +21,14 @@ pub struct ValidatorRequest {
     #[serde(default)]
     #[serde(skip_serializing_if = "Option::is_none")]
     pub graffiti: Option<GraffitiString>,
-    #[serde(with = "serde_utils::quoted_u64")]
+    #[serde(with = "eth2_serde_utils::quoted_u64")]
     pub deposit_gwei: u64,
 }
 
 #[derive(Clone, PartialEq, Serialize, Deserialize)]
 pub struct CreateValidatorsMnemonicRequest {
     pub mnemonic: ZeroizeString,
-    #[serde(with = "serde_utils::quoted_u32")]
+    #[serde(with = "eth2_serde_utils::quoted_u32")]
     pub key_derivation_path_offset: u32,
     pub validators: Vec<ValidatorRequest>,
 }
@@ -42,7 +42,7 @@ pub struct CreatedValidator {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub graffiti: Option<GraffitiString>,
     pub eth1_deposit_tx_data: String,
-    #[serde(with = "serde_utils::quoted_u64")]
+    #[serde(with = "eth2_serde_utils::quoted_u64")]
     pub deposit_gwei: u64,
 }